Help me to install MapThis!!!!PLZ

[farbsun]

Ok~
I recently purchased PSP GPS and Trying to install MapThis and things on my PSP but!!!
I am having NO IDEA HOW TO DO IT!!

Someone please help me how to install Mapthis and maps as step by step installing guide?
Also, I just update my PSP as 3.30 using WIFI on my PSP but I think I shouldn't?

Please help me how to install MapThis and If I need, how to downgrade my PSP!!!!

Thank you, Ya~~!!!!

[sourced]

you shouldnt have upgraded your psp. =/ you should get your psp to firmware 3.03 OE-C or sumthin like that. or, 1.50. there are alot of downgrading tools on this site. just look around.

[blackrave]

No point in looking around right now, because there is no downgrader for 3.30 yet. Either wait with any upgrades and wait for someone to find an exploit and the firmware, making a downgrader possible, or perhaps return your PSP to the store, then downgrade to 1.50 and upgrade to a custom firmware.